Hadith 3:296

Narrated Hakim bin Hizam:

The Prophet aid, "The buyer and the seller have the option to cancel
or to confirm the deal, as long as they have not parted or till they
part, and if they spoke the truth and told each other the defects of
the things, then blessings would be in their deal, and if they hid
something and told lies, the blessing of the deal would be lost."